Feature request

Is your feature request related to a problem? Please describe.

The examples/with-emotion example is using Emotion 10.

According to the Emotion SSR docs, the _document.js file is no longer required:

![Screen Shot 2020-10-05 at 15 04 17](https://user-images.githubusercontent.com/1935696/95082974-28356a00-071c-11eb-9793-29bc2b

Description

The gatsby-plugin-canonical-urls plugin adds a rel=canonical tag to the head of each HTML page.

Here is an example of code added to the head of the html document:

<link rel="canonical" href="https://www.abc.com" data-baseprotocol="https:" data-basehost="www.abc.com">

The potential problem is with

请不要直接在 issues 提交安全漏洞报告，目前已有一部分人正在使用该系统，你的公开提交很可能影响到他们的资料安全。

所以拜托以后直接发送安全漏洞信息到 hi@halo.run 谢谢！

Describe the bug

GitHub provides a few options when configuring a new repo like: license, .gitignore file, a README.md, and the Rennovate plugin. If you want to install any of these by default, which I usually do, then you get an error about the remote having newer content.

To Reproduce
Steps to reproduce the behavior:

1. Create a repo with a readme during the script
2. See the er